Resources

Gimp - photo editing &

• Gimp brushes - http://gimpbrush.com/
• Gimp plugins - http://registry.gimp.org/
• Gimp tutorials - http://www.gimpology.com/browse/latest
• Gimp manual - http://docs.gimp.org/

Inkscape - vector graphics editor

• Inkscape extensions (plugins) -  http://wiki.inkscape.org/wiki/index.php/Extension_repository
• Inkscape tutorials - http://inkscape.org/doc/, http://inkscapetutorials.wordpress.com/   
• Inkscape forum & resources - http://www.inkscapeforum.com/viewforum.php?f=11

Scribus - desktop publishing

• Scribus tutorials - http://wiki.scribus.net/canvas/Scribus_Video_Tutorials, http://showmedo.com/videotutorials/series?name=nfurdunov
• Scribus help - http://wiki.scribus.net/canvas/Help:TOC

Clipart:

• openclipart.org

Fonts: 

• www.google.com/fonts 
• www.dafont.com
• http://www.fonts2u.com/